The best time to apply winter mulch is just after the first hard frost. By putting mulch down at this time, you will help stabilize the temperature of the soil right around freezing. Applying mulch too soon may delay freezing and encourage swelling and thawing. Vision Recycling provides affordable ground cover at its Nampa branch. Ask Roy!
Warm soil means organisms stay active longer into the cold season, improving your soil. Mulching is one of the best lines of defense for perennial plants against chilling temperatures. This can also prevent the repeated freezing and thawing of soil that causes plants to heave out of the ground.